<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddRoleDialog"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表 -->
      <el-table :data="rolelist" stripe border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  type="primary"
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                >
                  {{ item1.authName }}
                  <i class="el-icon-caret-right"></i>
                </el-tag>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for 循环 嵌套渲染 二级权限 -->
                <el-row
                  :class="['bdtop', i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 二级 -->
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              size="mini"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row)"
            >
              编辑
            </el-button>
            <el-button
              type="danger"
              size="mini"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除
            </el-button>
            <el-button
              type="warning"
              size="mini"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >
              分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisable"
      width="50%"
      @close="setRightDialogClosed"
    >
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        :default-expand-all="true"
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisable = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"> 确 定 </el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="setAddRoleDialogVisable"
      width="40%"
    >
      <el-form
        :model="addRoleForm"
        :rules="addRoleRules"
        ref="addRoleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setAddRoleDialogVisable = false">取 消</el-button>
        <el-button type="primary" @click="addRole()">确 定</el-button>
      </span>
    </el-dialog>

    <el-dialog
      title="编辑角色"
      :visible.sync="setEditRoleDialogVisale"
      width="40%"
    >
      <el-form
        :model="editRoleForm"
        :rules="addRoleRules"
        ref="addRoleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setEditRoleDialogVisale = false">取 消</el-button>
        <el-button type="primary" @click="editRole()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisable: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: "",
      // 控制添加角色对话框的显示与隐藏
      setAddRoleDialogVisable: false,
      // 添加角色表单数据
      addRoleForm: {
        roleName: "",
        roleDesc: "",
      },
      // 添加角色表单验证规则
      addRoleRules: {
        roleName: [
          { required: true, message: "请输入角色名", trigger: "blur" },
        ],
      },
      // 控制编辑角色对话框的显示与隐藏
      setEditRoleDialogVisale: false,
      editRoleForm: {
        roleName: "",
        roleDesc: "",
        roleId: "",
      },
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    // 获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200)
        return this.$message.error("获取角色列表失败!");
      this.rolelist = res.data;
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm("是否要删除权限", "提示", {
        confirmButtonText: "确认",
        cancelButtonText: "取消",
        type: "warning",
      }).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      this.$message.success("删除权限成功");
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      }
      // 保存数据
      this.rightslist = res.data;

      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisable = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为 角色 分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr,
        }
      );
      if (res.meta.status !== 200) return this.$message.error("角色分配失败");

      this.$message.success("分配权限成功");
      this.getRoleList();
      this.setRightDialogVisable = false;
    },
    // 展示添加对话框
    showAddRoleDialog() {
      this.setAddRoleDialogVisable = true;
    },
    // 点击添加角色
    addRole() {
      // 验证表单是否通过
      this.$refs.addRoleFormRef.validate(async (valid) => {
        if (valid) {
          const { data: res } = await this.$http.post(
            "roles",
            this.addRoleForm
          );
          if (res.meta.status !== 201) {
            return this.$message.error("创建角色失败");
          }
          this.$message.success("创建用户成功");
          // 重新刷新数据
          this.getRoleList();
          // 关闭添加对话框
          this.setAddRoleDialogVisable = false;
        }
      });
    },
    // 重置添加角色表单
    addRoleDialogClosed() {
      this.$refs.addRoleRules.resetFields();
    },
    // 展示编辑角色信息对话框
    async showEditDialog(role) {
      // 获取编辑用户信息
      const { data: res } = await this.$http.get(`roles/${role.id}`);
      if (res.meta.status !== 200) {
        return this.$message.error("获取用户信息失败");
      }
      this.editRoleForm = res.data;
      this.setEditRoleDialogVisale = true;
    },
    // 编辑对应角色信息
    editRole() {
      // 验证表单规则是否通过
      this.$refs.addRoleFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error("请填写信息");
        const { data: res } = await this.$http.put(
          `roles/${this.editRoleForm.roleId}`,
          this.editRoleForm
        );
        if (res.meta.status !== 200) {
          return this.$message.error("编辑用户信息失败");
        }
        this.$message.success("编辑用户信息成功");
        this.getRoleList();
        this.setEditRoleDialogVisale = false;
      });
    },
    // 删除对应ID角色信息
    async removeRoleById(id) {
      const confirmResult = await this.$confirm(
        "此操作将删除改角色信息, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((error) => error);
      if (confirmResult != "confirm")
        return this.$message.info("已经取消删除行为");
      const { data: res } = await this.$http.delete(`roles/${id}`);
      if (res.meta.status !== 200) return this.$message.error("删除角色失败");
      this.$message.success("删除用户成功");
      this.getRoleList();
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
